CVE-2026-89448
iommu/vt-d: Force requesting ACS when tboot is enabled
CVSS Score
9.3
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Force requesting ACS when tboot is enabled Currently the conditions of requesting ACS in detect_intel_iommu() don't include tboot, leading to a possible misconfiguration with ACS disabled (e.g. due to user opts) while iommu is later forced on by tboot_force_iommu(). Fix it by checking tboot in detect_intel_iommu().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new critical vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
5d990b627537e59a3a2f039ff588a4750e9c1a6a < 579eb867d3da63f3b5e32f235925e1daa7ec70d0 5d990b627537e59a3a2f039ff588a4750e9c1a6a < aaeb81241e802c86be69394f72d49fde3f861fbb 5d990b627537e59a3a2f039ff588a4750e9c1a6a < 45705a6bfdb283f7b3b509010fd617b72f942537 5d990b627537e59a3a2f039ff588a4750e9c1a6a < 87bc611c6c98a41c00feb7b06b0c297dd141a2ae 5d990b627537e59a3a2f039ff588a4750e9c1a6a < 607432b2618b61df81134be0ef2562b8300c1216
Linux / Linux
2.6.33
References
git.kernel.org: https://git.kernel.org/stable/c/579eb867d3da63f3b5e32f235925e1daa7ec70d0 git.kernel.org: https://git.kernel.org/stable/c/aaeb81241e802c86be69394f72d49fde3f861fbb git.kernel.org: https://git.kernel.org/stable/c/45705a6bfdb283f7b3b509010fd617b72f942537 git.kernel.org: https://git.kernel.org/stable/c/87bc611c6c98a41c00feb7b06b0c297dd141a2ae git.kernel.org: https://git.kernel.org/stable/c/607432b2618b61df81134be0ef2562b8300c1216